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2023 D Major struck thru grease shield cent
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<p>[QUOTE="ToughCOINS, post: 26098822, member: 20480"]My thoughts? . . . The planchet was not annealed and subsequently washed before strike.</p><p><br /></p><p>The nearly complete preservation of the mill lines on both sides of the coin, the squarish rims, the softer design details, the complete absence of cartwheel luster and the dull look has me thinkingthe above.</p><p><br /></p><p>Striking a properly annealed planchet should move far more metal than we see here. Moreover, the fully upset edge of the rim should be at least partially rounded by the strike, but appears not to have been, presumably because of higher than normal hardness.</p><p><br /></p><p>Moreover, the mill roller striations should have been completely obliterated by flow lines. A harder planchet (from bypassing the annealing process) inhibits those by-products of the striking process.</p><p><br /></p><p>Flowing metal produces luster, and we see none here. The absence of cartwheel luster would at least partially account for the extremely dull look of this coin.</p><p><br /></p><p>While the coin is notably lifeless, I do not believe it was cleaned. Normally, after annealing and quenching, planchets get washed and burnished to remove oxides and brighten them prior to striking. </p><p><br /></p><p>I believe this planchet went directly from blanking to the coining press.[/QUOTE]</p><p><br /></p>
[QUOTE="ToughCOINS, post: 26098822, member: 20480"]My thoughts? . . . The planchet was not annealed and subsequently washed before strike. The nearly complete preservation of the mill lines on both sides of the coin, the squarish rims, the softer design details, the complete absence of cartwheel luster and the dull look has me thinkingthe above. Striking a properly annealed planchet should move far more metal than we see here. Moreover, the fully upset edge of the rim should be at least partially rounded by the strike, but appears not to have been, presumably because of higher than normal hardness. Moreover, the mill roller striations should have been completely obliterated by flow lines. A harder planchet (from bypassing the annealing process) inhibits those by-products of the striking process. Flowing metal produces luster, and we see none here. The absence of cartwheel luster would at least partially account for the extremely dull look of this coin. While the coin is notably lifeless, I do not believe it was cleaned. Normally, after annealing and quenching, planchets get washed and burnished to remove oxides and brighten them prior to striking. I believe this planchet went directly from blanking to the coining press.[/QUOTE]
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2023 D Major struck thru grease shield cent
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